Pressure In Liquids & Stress On Solids Flashcards
(12 cards)
How does pressure in liquids change with depth?
Pressure in liquids increases with depth due to the weight of water above.
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What is upthrust?
Upthrust is the force exerted by a liquid to push an object upwards.
Why do objects float in water?
Objects float if they displace a weight of liquid equal to their own weight.
How are dams designed to withstand pressure?
Dams have thicker walls at the bottom to withstand higher pressure.
How are submarines and deep-sea creatures adapted to high pressure?
Submarines and deep-sea creatures are designed to withstand high pressures.
Define stress in solids.
Stress is the force per unit area applied to a solid object.
What is the formula for stress?
Stress = Force / Surface Area
What factors affect stress?
Weight increases stress, while a larger surface area reduces stress.
How do wide skis prevent sinking in snow?
Wide skis distribute weight to prevent sinking in snow.
Why does a bed of nails allow a person to lie on it?
A bed of nails has less stress per nail compared to a single nail.
How does the number of wheels on a truck affect stress on ice?
Trucks with more wheels exert less stress on ice, preventing breaking through.
